Size: 4-button type, 6-button type Size Description: *Actual size may vary slightly due to manual measurement. Material: PU, ABS, Sponge Colors: Red, Gold, Black 4-button type / 6-button type Infrared heating function, gently warms and makes your feet feel toasty. With infrared heating function, it relieves pain and muscle tension, making massage easier. Offers 3 different levels of intensity. 10 large and small kneading balls are placed on the left and right soles, realizing a sensation like a hand massage. Easy to operate, and its compact size makes it a popular foot massager that can be used anywhere.